Half to charles s



No. 625,962. Patented May', |899.

v. BEAUREGARD.

D 0 0 R C H E C I( (Application led May 26, 1898.;

2 Sheets-Sheet I.

@No Model.)

@MMW

Patented May 30, |899.

^ BgEAMREaAnn.

M1913; QHiECK.

(,mglicatibna BM May 26, 1898.)

2 Sheets-Sheet 2.

(No Model.)

UNITED STATESL PATENT OFFICE.

VICTOR BEAUREGARD," OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-Y HALF TOCHARLES S. GOYODING, OF SAME PLACE.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent N'. 625,962, dated May 30,1899.

Application filed May 26, 1898- Serial No. 681,828. (No model.)

To a/ZZ whom, it may concern,.-

Be it known that I, VICTOR BEAUREGARD, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented new and useful Improvements in Door-Checks, of which thefollowing is a specification.

This invention is of thel class of checks known as pneumatic, and hasfor its object to produce a cheap, simple, and durable door-check whichmay be easily applied to or disconnected from a door and which is notrendered inoperative by the varying conditions to which such devices aresubjected in practical use, as fully set forth in the followingspecification.

The invention consists in a new and improved device for closing andchecking the door, consisting of a spring so constructed and arranged asto close the door and also constituting an elem ent of the mechanismwhereby the door is checked.

The invention further consists in a flexible connection between theparts thereof which are attached to the door and those which areattached to the casing.

The inventionl still further consists in cerf tain details ofconstruction and combination of parts, as set forth in the followingspecification and pointed out in the claims thereof. In the drawingssimilar numerals refer to similar parts throughout the several viewsfReferring to the drawings, Figure 1 is a front elevation of my improveddoor-check, showing the same applied to a door with the door closed.Fig. 2 is a plan view of the same, the checking-cylinder being shown insection and the door closed. Fig. 3 is a plan view showing the doorpartly open. Fig. 4. is a plan view showing the check arranged tooperate upon the opposite side of the door from that shown in Figs. 1,2, and 3. Fig. 5 is a plan view of a modified form of check. Fig. 6 is aplan View, partly in section, of another modiflcation of my improvedcheck. Fig. 7 is a section of the checking-cylinder, showing therelative positions of the cylinder, piston, and piston-rod when the dooris partly open. Fig. 8 is a section of the checkingcylinder, showing therelative positions of the cylinder, piston, and piston-rod when the dooris wide open.

In the drawings, Figs. 1, 2, and 3, a spiral torsional spring 1 issupported in ahollow cylinder 2 on the bracket 3,A attached to thedoor-casing 4. One end of said spring passes through a hole 5 in thecylinder 2 and is fas tened thereto. The free end 6 of said springextends outwardly from said bracket 3 and, passing through thehead 7 ofthe cylinder S, forms a piston-rod, to which a piston 9 is fastened. YSaid piston 9 has a leather packing 10 attached thereto. A tapered splitregu-V lating-screw 11 regulates the exit of the air compressed in thecylinder S as the door closes. The head 7 has a stem 12 thereon, whichturns freely in a bearing in the bracket 13, said bracket being fastenedto the door 11i by screws.

The operation of the device illustrated in Figs. 1, 2, and 3 is asfollows: As the door is opened the spring 1 is wound up by the cylinder8, pivoted to bracket 13 on the door 14 and the free end 6 of saidspring, the different parts assuming the positions shown in Fig. 3. Assoon as the door is released the spring 1 reacts, closing the doorthrough the medium of the free end 6 of said spring and the cylinder 8.In addition to closing the door the spring 1, through the free end 6,operates the piston 9 in the cylinder 8. When the door is opening, thepiston is drawn back in the cylinder S by the spring 1 and the free end6 thereof from the position shown in Fig. 2 to that shown in Fig. 3.Vhen the door is closing, the spring 1, through the free end 6 thereof,takes the thrust of the door through the compressed air in the cylinder8 upon the piston 9 and through the free end 6 thereof, thus checkingthe door. It will be seen, therefore, that the door is closed by thespring 1 and its free end 6 and that said free end of the spring alsoconstitutes an element of the mechanism whereby the door is checked,which construction brings less strain to bear upon the hinges of thedoor when the checking action takes place. Another and very importantadvantage derived from the direct connection of the piston to the spring1 through the piston-rod or free end 6 of said IOO spring is that theconnection from the parts upon the door to the parts upon the doorframeis iiexible in a vertical plane, so that in case the door sags upon thehinges or if the check is not set up accurately the spring 1 will moveup or down and accommodate itself to the diiterent positions of thecylinder and piston without cramping the different working parts audcausing a friction which would prevent the door from closing. Theimportance of this feature in a device et the kind described cannot beoverestimated, as any 'friction of the working parts necessitates aheavier spring than would otherwise be necessary to close the door, anda heavy spring necessitates a large cylinder, thus rendering the devicecumbersome and expensive.

In Fig. @t I have illustrated my invent-ion applied to a door upon theopposite side from that shown in Figs. 1, 2, and 3, the spring 1 andbracket 3 being attached to the door and the cylinder pivoted to abracket 13, attached to the door-frame. In this arrangement of thedevice the spring pullslthe door to instead of pushing, as in Fig. 1, 2,and 3; but the operation ot the check is otherwise the same as in theform described above.

In Fig. 5 I have illustrated a modified form of check in which the freeend G of the spring 1 is inclosed by a tube or piston-rod 15. Saidpiston-rod is rigidly att-ached to the free end b', so that theoperation ot` the device is precisely the s'ame as that illustrated inFigs. 1, 2, and 3.

In order to place the cylinder S and spring 1 at a-praetical distancefrom the hinges of the door and to enable the door to be opened at anangle of about one hundred and eighty degrees from its position whenclosed and to accomplish this result without making the device large andcumbersome, I have provided an extensible or telescopic piston-rod.(Illustrated in Figs. 6, 7, and S.) The free end G of the spring 1 andthe tube or piston-rod 15, rigidly fastened thereto, are ofsubstantially the same construction as that shown in Fig. 5; but thetube 15 is not fastened directly to the piston f), but is connectedtherewith by a tube 1G, which incloses said tube 15 and is joinedthereto by a spiral retractile spring 17. The other parts ot the checkare substantially t-he same as in the forms previously herein described.of the diterent parts when the door is closed. In Fig. 7 the relativepositions of the cylinder, piston, and piston-rod are shown when thedooris opened at an angle of about ninety degrees. \Vhen the doorisopened to a greater angle, the parts assume the position shown in Fig.8, the tube 1G slidingr upon the tube 15 and stretching the spring 17according to the angle at which the door is opened. The funetion of thespring 17 is not to close the door, as the spring 1 would close the doorif the spring 17 were omitted; but the function of said spring is togovern the position of the tube 15 in the tube 1G, so that when the doorIn Fig. (i I have shown the position is closing and arrives at about anangle of ninety degrees from its position when closed the tube 15 willbe in the position shown in Fig. 7 and the compression of the air willtake place from that point to the time when the door is nearly closed.TVithout the spring 17 the tubes 15 and 16 would be liable to cramp uponeach other in the position shown in Fig. 8, and thus the air in thecylinder would be compressed When said door is closing from one hundredand eighty degrees to ninety degrees with the result that the door wouldnot be checked at the proper time, which is just before the door closes.It will thus be seen that from ninety degrees to closing the action ofthe spring 1 is the same as to closing and checking the door in each ofthe different forms described.

lIaving thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a pneumatic'check, a cylinder pivotally secured to a door ordoor-casin g and having a piston therein, in combination with a spiraltorsional spring having a free end operatively connected to the pistonto form an element of the checking mechanism and its other end adaptedto be fastened to a doorcasing or door, substantially as described.

2. In a pneumatic check, acylinderpivoted to a bracket adapted to beattached to a door or door-casing, a piston and piston-rod, incombination with a spiral torsional spring, one end of which is rigidlyattached to the piston-rod, the other end adapted to be fastened to adoor-casing or door, in such amanner as to form a connection, flexiblein a vertical plane, between said door and door-casing, substantially asdescribed for the purpose specified.

3. In a pneumatic door-check, a cylinder pivoted to a bracket, adaptedto be attached to a door or door-casing in combination with a piston andtelescopic piston-rod, consisting of two tubes, one of saidA tubes fastto the piston, the other rigidly attached to a spiral torsional spring,adapted to be fastened to a doorcasing ordoor, substantially asdescribed, for the purpose specified.

4. In a pneumatic check, a cylinder pivoted to a bracket, adapted to beattached to a door` or door-casing, in combination with a piston andtelescopic piston-rod, consisting of two tubes, attached to each otherby a spiral spring, one of said tubes fast to the piston, the otherrigidly attached to a spiral torsional spring, adapted to he fastened toa door-casing or door, substantially as described for the purposespecified.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

VICTOR BEAUREGARD.

Witnesses:

HERBERT E. NOBLE, E. L. BROWN.

IOO

IIC

